./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:56:07,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:56:07,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:56:07,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:56:07,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:56:07,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:56:07,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:56:07,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:56:07,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:56:07,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:56:07,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:56:07,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:56:07,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:56:07,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:56:07,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:56:07,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:56:07,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:56:07,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:56:07,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:56:07,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:56:07,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:56:07,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:56:07,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:56:07,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:56:07,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:56:07,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:56:07,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:56:07,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:56:07,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:56:07,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:56:07,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:56:07,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:56:07,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:56:07,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:56:07,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:56:07,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:56:07,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:56:07,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:56:07,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:56:07,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:56:07,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:56:07,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:56:07,152 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:56:07,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:56:07,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:56:07,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:56:07,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:56:07,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:56:07,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:56:07,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:56:07,156 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:56:07,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:56:07,157 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:56:07,157 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:56:07,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:56:07,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:56:07,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:56:07,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:56:07,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:56:07,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:56:07,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:56:07,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:56:07,159 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:56:07,159 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:56:07,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:56:07,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:56:07,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:56:07,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:56:07,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:56:07,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:56:07,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:56:07,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:56:07,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:56:07,161 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:56:07,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:56:07,162 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:56:07,162 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:56:07,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:56:07,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:56:07,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:56:07,473 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:56:07,474 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:56:07,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-08-29 22:56:08,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:56:08,878 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:56:08,879 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-08-29 22:56:08,890 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a775cee79/3b5060d9d5c04793b4b5aa6032f0a3c6/FLAGd53d79848 [2023-08-29 22:56:08,902 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a775cee79/3b5060d9d5c04793b4b5aa6032f0a3c6 [2023-08-29 22:56:08,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:56:08,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:56:08,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:56:08,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:56:08,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:56:08,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:56:08" (1/1) ... [2023-08-29 22:56:08,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78cef68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:08, skipping insertion in model container [2023-08-29 22:56:08,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:56:08" (1/1) ... [2023-08-29 22:56:08,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:56:08,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:56:09,151 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-08-29 22:56:09,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:56:09,183 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:56:09,239 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-08-29 22:56:09,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:56:09,267 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:56:09,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09 WrapperNode [2023-08-29 22:56:09,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:56:09,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:56:09,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:56:09,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:56:09,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,347 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-08-29 22:56:09,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:56:09,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:56:09,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:56:09,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:56:09,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:56:09,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:56:09,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:56:09,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:56:09,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (1/1) ... [2023-08-29 22:56:09,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:56:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:56:09,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:56:09,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:56:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:56:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:56:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:56:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:56:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:56:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:56:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:56:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:56:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:56:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:56:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:56:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:56:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:56:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:56:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:56:09,523 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:56:09,685 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:56:09,687 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:56:10,515 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:56:10,525 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:56:10,525 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 22:56:10,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:56:10 BoogieIcfgContainer [2023-08-29 22:56:10,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:56:10,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:56:10,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:56:10,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:56:10,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:56:08" (1/3) ... [2023-08-29 22:56:10,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1a1722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:56:10, skipping insertion in model container [2023-08-29 22:56:10,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:56:09" (2/3) ... [2023-08-29 22:56:10,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1a1722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:56:10, skipping insertion in model container [2023-08-29 22:56:10,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:56:10" (3/3) ... [2023-08-29 22:56:10,535 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-08-29 22:56:10,550 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:56:10,550 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-08-29 22:56:10,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:56:10,728 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 22:56:10,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 724 places, 787 transitions, 1598 flow [2023-08-29 22:56:11,128 INFO L130 PetriNetUnfolder]: 73/784 cut-off events. [2023-08-29 22:56:11,128 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:56:11,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 784 events. 73/784 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2897 event pairs, 0 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-08-29 22:56:11,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 724 places, 787 transitions, 1598 flow [2023-08-29 22:56:11,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 717 places, 780 transitions, 1578 flow [2023-08-29 22:56:11,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:56:11,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 717 places, 780 transitions, 1578 flow [2023-08-29 22:56:11,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 717 places, 780 transitions, 1578 flow [2023-08-29 22:56:11,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 717 places, 780 transitions, 1578 flow [2023-08-29 22:56:11,426 INFO L130 PetriNetUnfolder]: 73/780 cut-off events. [2023-08-29 22:56:11,426 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 22:56:11,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 780 events. 73/780 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2894 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-08-29 22:56:11,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 196080 [2023-08-29 22:56:47,908 INFO L134 LiptonReduction]: Checked pairs total: 220167 [2023-08-29 22:56:47,909 INFO L136 LiptonReduction]: Total number of compositions: 1058 [2023-08-29 22:56:47,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:56:47,926 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33539445, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:56:47,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2023-08-29 22:56:47,931 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:56:47,931 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:56:47,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:47,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:56:47,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:56:47,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash 111115, now seen corresponding path program 1 times [2023-08-29 22:56:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745175667] [2023-08-29 22:56:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:47,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:56:48,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:48,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745175667] [2023-08-29 22:56:48,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745175667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:48,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:48,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:56:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582231825] [2023-08-29 22:56:48,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:48,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:56:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:56:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:56:48,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 722 out of 1845 [2023-08-29 22:56:48,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:48,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:48,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 722 of 1845 [2023-08-29 22:56:48,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:58,859 INFO L130 PetriNetUnfolder]: 71352/95312 cut-off events. [2023-08-29 22:56:58,860 INFO L131 PetriNetUnfolder]: For 1188/1188 co-relation queries the response was YES. [2023-08-29 22:56:58,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192063 conditions, 95312 events. 71352/95312 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 4078. Compared 579561 event pairs, 58845 based on Foata normal form. 0/29264 useless extension candidates. Maximal degree in co-relation 185500. Up to 95307 conditions per place. [2023-08-29 22:56:59,358 INFO L137 encePairwiseOnDemand]: 1818/1845 looper letters, 101 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2023-08-29 22:56:59,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 446 flow [2023-08-29 22:56:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2296 transitions. [2023-08-29 22:56:59,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-08-29 22:56:59,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2296 transitions. [2023-08-29 22:56:59,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2296 transitions. [2023-08-29 22:56:59,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:59,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2296 transitions. [2023-08-29 22:56:59,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 765.3333333333334) internal successors, (2296), 3 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:59,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:59,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:59,424 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 250 flow. Second operand 3 states and 2296 transitions. [2023-08-29 22:56:59,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 446 flow [2023-08-29 22:56:59,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 434 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 22:56:59,522 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 250 flow [2023-08-29 22:56:59,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2023-08-29 22:56:59,527 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -18 predicate places. [2023-08-29 22:56:59,528 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 250 flow [2023-08-29 22:56:59,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:59,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:59,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:56:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:56:59,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:56:59,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash 111114, now seen corresponding path program 1 times [2023-08-29 22:56:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:59,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735727125] [2023-08-29 22:56:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:59,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:56:59,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:59,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735727125] [2023-08-29 22:56:59,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735727125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:59,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:59,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:56:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341113495] [2023-08-29 22:56:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:59,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:56:59,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:59,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:56:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:56:59,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 1845 [2023-08-29 22:56:59,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:56:59,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:59,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 1845 [2023-08-29 22:56:59,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:57:08,382 INFO L130 PetriNetUnfolder]: 71352/95306 cut-off events. [2023-08-29 22:57:08,382 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-29 22:57:08,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191229 conditions, 95306 events. 71352/95306 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4042. Compared 579057 event pairs, 58845 based on Foata normal form. 6/29272 useless extension candidates. Maximal degree in co-relation 191192. Up to 95306 conditions per place. [2023-08-29 22:57:08,799 INFO L137 encePairwiseOnDemand]: 1841/1845 looper letters, 100 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-08-29 22:57:08,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 446 flow [2023-08-29 22:57:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:57:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:57:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2285 transitions. [2023-08-29 22:57:08,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128274616079494 [2023-08-29 22:57:08,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2285 transitions. [2023-08-29 22:57:08,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2285 transitions. [2023-08-29 22:57:08,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:57:08,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2285 transitions. [2023-08-29 22:57:08,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 761.6666666666666) internal successors, (2285), 3 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:08,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:08,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:08,824 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 250 flow. Second operand 3 states and 2285 transitions. [2023-08-29 22:57:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 446 flow [2023-08-29 22:57:08,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:57:08,829 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 240 flow [2023-08-29 22:57:08,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2023-08-29 22:57:08,831 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-08-29 22:57:08,831 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 240 flow [2023-08-29 22:57:08,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:08,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:57:08,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:57:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:57:08,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:57:08,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:57:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash 3450404, now seen corresponding path program 1 times [2023-08-29 22:57:08,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:57:08,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665359835] [2023-08-29 22:57:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:57:08,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:57:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:57:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:57:09,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665359835] [2023-08-29 22:57:09,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665359835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:57:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982005989] [2023-08-29 22:57:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:57:09,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:57:09,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:57:09,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:57:09,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:57:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:57:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:57:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:57:09,221 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:57:09,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:57:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:09,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:57:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982005989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:57:09,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:57:09,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 22:57:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716307593] [2023-08-29 22:57:09,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:57:09,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:57:09,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:57:09,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:57:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:57:10,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 713 out of 1845 [2023-08-29 22:57:10,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:10,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:57:10,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 713 of 1845 [2023-08-29 22:57:10,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:57:35,435 INFO L130 PetriNetUnfolder]: 214054/285907 cut-off events. [2023-08-29 22:57:35,435 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2023-08-29 22:57:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573638 conditions, 285907 events. 214054/285907 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959339 event pairs, 176535 based on Foata normal form. 0/87787 useless extension candidates. Maximal degree in co-relation 573630. Up to 95304 conditions per place. [2023-08-29 22:57:36,560 INFO L137 encePairwiseOnDemand]: 1833/1845 looper letters, 273 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2023-08-29 22:57:36,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 292 transitions, 1256 flow [2023-08-29 22:57:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:57:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:57:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4584 transitions. [2023-08-29 22:57:36,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140921409214092 [2023-08-29 22:57:36,750 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4584 transitions. [2023-08-29 22:57:36,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4584 transitions. [2023-08-29 22:57:36,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:57:36,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4584 transitions. [2023-08-29 22:57:36,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 764.0) internal successors, (4584), 6 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:36,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:36,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:36,793 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 240 flow. Second operand 6 states and 4584 transitions. [2023-08-29 22:57:36,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 292 transitions, 1256 flow [2023-08-29 22:57:36,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 292 transitions, 1255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:57:36,801 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 381 flow [2023-08-29 22:57:36,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-08-29 22:57:36,803 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-29 22:57:36,803 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 381 flow [2023-08-29 22:57:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:36,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:57:36,806 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:57:36,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:57:37,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:57:37,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:57:37,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:57:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash -282431413, now seen corresponding path program 2 times [2023-08-29 22:57:37,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:57:37,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318840688] [2023-08-29 22:57:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:57:37,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:57:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:57:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:57:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318840688] [2023-08-29 22:57:37,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318840688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:57:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155618342] [2023-08-29 22:57:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:57:37,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:57:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:57:37,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:57:37,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:57:37,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:57:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:57:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:57:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:57:37,505 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 22:57:37,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-29 22:57:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:57:37,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:57:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155618342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:57:37,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:57:37,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-08-29 22:57:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498309860] [2023-08-29 22:57:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:57:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:57:37,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:57:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:57:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:57:38,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-08-29 22:57:38,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:57:38,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:57:38,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-08-29 22:57:38,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:03,984 INFO L130 PetriNetUnfolder]: 214054/285904 cut-off events. [2023-08-29 22:58:03,985 INFO L131 PetriNetUnfolder]: For 570/570 co-relation queries the response was YES. [2023-08-29 22:58:04,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573676 conditions, 285904 events. 214054/285904 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959645 event pairs, 176535 based on Foata normal form. 3/87795 useless extension candidates. Maximal degree in co-relation 573664. Up to 95300 conditions per place. [2023-08-29 22:58:05,383 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 270 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2023-08-29 22:58:05,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 289 transitions, 1321 flow [2023-08-29 22:58:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:58:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:58:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5367 transitions. [2023-08-29 22:58:05,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41556329849012774 [2023-08-29 22:58:05,397 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5367 transitions. [2023-08-29 22:58:05,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5367 transitions. [2023-08-29 22:58:05,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:05,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5367 transitions. [2023-08-29 22:58:05,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 766.7142857142857) internal successors, (5367), 7 states have internal predecessors, (5367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:05,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:05,427 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:05,427 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 381 flow. Second operand 7 states and 5367 transitions. [2023-08-29 22:58:05,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 289 transitions, 1321 flow [2023-08-29 22:58:05,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 289 transitions, 1289 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:58:05,433 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 357 flow [2023-08-29 22:58:05,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2023-08-29 22:58:05,434 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-29 22:58:05,434 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 357 flow [2023-08-29 22:58:05,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:05,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:05,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-08-29 22:58:05,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:58:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-29 22:58:05,642 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:05,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1912003009, now seen corresponding path program 1 times [2023-08-29 22:58:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:05,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233052556] [2023-08-29 22:58:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:05,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:58:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233052556] [2023-08-29 22:58:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233052556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:58:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395786710] [2023-08-29 22:58:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:05,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:58:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:58:05,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:58:05,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:58:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:05,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:58:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:58:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:58:05,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:58:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 22:58:05,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395786710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:58:05,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:58:05,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-29 22:58:05,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082238513] [2023-08-29 22:58:05,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:58:05,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:58:05,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:58:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:58:06,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-08-29 22:58:06,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:06,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:06,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-08-29 22:58:06,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:14,949 INFO L130 PetriNetUnfolder]: 71352/95315 cut-off events. [2023-08-29 22:58:14,949 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-08-29 22:58:15,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191292 conditions, 95315 events. 71352/95315 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4074. Compared 578795 event pairs, 58845 based on Foata normal form. 5/29284 useless extension candidates. Maximal degree in co-relation 191281. Up to 95301 conditions per place. [2023-08-29 22:58:15,359 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 92 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-08-29 22:58:15,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 567 flow [2023-08-29 22:58:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:58:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:58:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5200 transitions. [2023-08-29 22:58:15,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263259775454896 [2023-08-29 22:58:15,371 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5200 transitions. [2023-08-29 22:58:15,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5200 transitions. [2023-08-29 22:58:15,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:15,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5200 transitions. [2023-08-29 22:58:15,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 742.8571428571429) internal successors, (5200), 7 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:15,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:15,401 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:15,401 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 357 flow. Second operand 7 states and 5200 transitions. [2023-08-29 22:58:15,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 567 flow [2023-08-29 22:58:15,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 530 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-29 22:58:15,404 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 388 flow [2023-08-29 22:58:15,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2023-08-29 22:58:15,405 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2023-08-29 22:58:15,405 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 388 flow [2023-08-29 22:58:15,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:15,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:15,408 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:58:15,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:58:15,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:58:15,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:15,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:15,614 INFO L85 PathProgramCache]: Analyzing trace with hash -359831731, now seen corresponding path program 2 times [2023-08-29 22:58:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913215711] [2023-08-29 22:58:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:58:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913215711] [2023-08-29 22:58:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913215711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:58:16,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:58:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:58:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38861397] [2023-08-29 22:58:16,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:58:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:58:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:58:16,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 1845 [2023-08-29 22:58:16,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:16,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:16,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 1845 [2023-08-29 22:58:16,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:23,570 INFO L130 PetriNetUnfolder]: 54076/72890 cut-off events. [2023-08-29 22:58:23,571 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2023-08-29 22:58:23,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146461 conditions, 72890 events. 54076/72890 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 3107. Compared 438501 event pairs, 44405 based on Foata normal form. 0/24247 useless extension candidates. Maximal degree in co-relation 146447. Up to 72890 conditions per place. [2023-08-29 22:58:23,924 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-29 22:58:23,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 590 flow [2023-08-29 22:58:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:58:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:58:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2282 transitions. [2023-08-29 22:58:23,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122854561878952 [2023-08-29 22:58:23,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2282 transitions. [2023-08-29 22:58:23,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2282 transitions. [2023-08-29 22:58:23,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:23,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2282 transitions. [2023-08-29 22:58:23,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 760.6666666666666) internal successors, (2282), 3 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:23,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:23,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:23,943 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 388 flow. Second operand 3 states and 2282 transitions. [2023-08-29 22:58:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 590 flow [2023-08-29 22:58:23,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 554 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-29 22:58:23,946 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 340 flow [2023-08-29 22:58:23,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2023-08-29 22:58:23,947 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-08-29 22:58:23,947 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 340 flow [2023-08-29 22:58:23,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:23,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:23,948 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-29 22:58:23,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:58:23,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:23,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash -359831729, now seen corresponding path program 1 times [2023-08-29 22:58:23,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:23,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197618085] [2023-08-29 22:58:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:23,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:58:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197618085] [2023-08-29 22:58:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197618085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:58:24,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:58:24,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:58:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89339909] [2023-08-29 22:58:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:58:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:58:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:58:24,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-08-29 22:58:24,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:24,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:24,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-08-29 22:58:24,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:29,880 INFO L130 PetriNetUnfolder]: 36800/50465 cut-off events. [2023-08-29 22:58:29,880 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:58:30,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101590 conditions, 50465 events. 36800/50465 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 303387 event pairs, 29965 based on Foata normal form. 0/19215 useless extension candidates. Maximal degree in co-relation 101575. Up to 50465 conditions per place. [2023-08-29 22:58:30,138 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-08-29 22:58:30,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 538 flow [2023-08-29 22:58:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:58:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:58:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2256 transitions. [2023-08-29 22:58:30,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075880758807588 [2023-08-29 22:58:30,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2256 transitions. [2023-08-29 22:58:30,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2256 transitions. [2023-08-29 22:58:30,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:30,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2256 transitions. [2023-08-29 22:58:30,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 752.0) internal successors, (2256), 3 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:30,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:30,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:30,154 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 340 flow. Second operand 3 states and 2256 transitions. [2023-08-29 22:58:30,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 538 flow [2023-08-29 22:58:30,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:58:30,157 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 327 flow [2023-08-29 22:58:30,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2023-08-29 22:58:30,158 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2023-08-29 22:58:30,158 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 327 flow [2023-08-29 22:58:30,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:30,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:30,160 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:58:30,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:58:30,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:30,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135794, now seen corresponding path program 1 times [2023-08-29 22:58:30,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:30,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423263071] [2023-08-29 22:58:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:30,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:58:30,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:30,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423263071] [2023-08-29 22:58:30,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423263071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:58:30,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:58:30,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:58:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188001712] [2023-08-29 22:58:30,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:58:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:58:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:58:30,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-08-29 22:58:30,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:30,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:30,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-08-29 22:58:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:35,648 INFO L130 PetriNetUnfolder]: 36246/49655 cut-off events. [2023-08-29 22:58:35,649 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:58:35,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99971 conditions, 49655 events. 36246/49655 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 296219 event pairs, 29511 based on Foata normal form. 0/19073 useless extension candidates. Maximal degree in co-relation 99955. Up to 49655 conditions per place. [2023-08-29 22:58:35,941 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-08-29 22:58:35,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 531 flow [2023-08-29 22:58:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:58:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:58:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2254 transitions. [2023-08-29 22:58:35,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40722673893405603 [2023-08-29 22:58:35,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2254 transitions. [2023-08-29 22:58:35,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2254 transitions. [2023-08-29 22:58:35,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:35,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2254 transitions. [2023-08-29 22:58:35,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 751.3333333333334) internal successors, (2254), 3 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:35,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:35,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:35,955 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 327 flow. Second operand 3 states and 2254 transitions. [2023-08-29 22:58:35,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 531 flow [2023-08-29 22:58:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:58:35,958 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 324 flow [2023-08-29 22:58:35,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2023-08-29 22:58:35,958 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -15 predicate places. [2023-08-29 22:58:35,959 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 324 flow [2023-08-29 22:58:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:35,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:35,960 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:58:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:58:35,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:35,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135793, now seen corresponding path program 1 times [2023-08-29 22:58:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702038007] [2023-08-29 22:58:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:58:36,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702038007] [2023-08-29 22:58:36,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702038007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:58:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289368172] [2023-08-29 22:58:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:36,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:58:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:58:36,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:58:36,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:58:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:36,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:58:36,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:58:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:58:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:58:36,845 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-08-29 22:58:36,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-08-29 22:58:36,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-08-29 22:58:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:58:36,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:58:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:58:36,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:58:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-29 22:58:37,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:58:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289368172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:58:37,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:58:37,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-08-29 22:58:37,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860340961] [2023-08-29 22:58:37,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:37,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:58:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:58:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:58:37,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 735 out of 1845 [2023-08-29 22:58:37,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:37,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:37,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 735 of 1845 [2023-08-29 22:58:37,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:41,890 INFO L130 PetriNetUnfolder]: 35692/48845 cut-off events. [2023-08-29 22:58:41,891 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:58:42,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98352 conditions, 48845 events. 35692/48845 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 291352 event pairs, 29057 based on Foata normal form. 0/18931 useless extension candidates. Maximal degree in co-relation 98335. Up to 48845 conditions per place. [2023-08-29 22:58:42,146 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 101 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-29 22:58:42,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 524 flow [2023-08-29 22:58:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:58:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:58:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2294 transitions. [2023-08-29 22:58:42,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445347786811204 [2023-08-29 22:58:42,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2294 transitions. [2023-08-29 22:58:42,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2294 transitions. [2023-08-29 22:58:42,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:42,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2294 transitions. [2023-08-29 22:58:42,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 764.6666666666666) internal successors, (2294), 3 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:42,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:42,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:42,159 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 324 flow. Second operand 3 states and 2294 transitions. [2023-08-29 22:58:42,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 524 flow [2023-08-29 22:58:42,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:58:42,162 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 321 flow [2023-08-29 22:58:42,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2023-08-29 22:58:42,163 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -16 predicate places. [2023-08-29 22:58:42,163 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 321 flow [2023-08-29 22:58:42,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:42,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:42,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:58:42,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:58:42,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:58:42,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:42,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash 493713100, now seen corresponding path program 1 times [2023-08-29 22:58:42,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:42,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374964372] [2023-08-29 22:58:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:42,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:58:42,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:42,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374964372] [2023-08-29 22:58:42,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374964372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:58:42,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559951324] [2023-08-29 22:58:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:58:42,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:58:42,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:58:42,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:58:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 22:58:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:58:42,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:58:43,044 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:58:43,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 22:58:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:58:43,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:58:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:58:43,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559951324] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:58:43,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:58:43,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-08-29 22:58:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183247372] [2023-08-29 22:58:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:43,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:58:43,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:58:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-08-29 22:58:44,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 1845 [2023-08-29 22:58:44,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:44,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:44,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 1845 [2023-08-29 22:58:44,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:58:53,451 INFO L130 PetriNetUnfolder]: 64726/88717 cut-off events. [2023-08-29 22:58:53,451 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-29 22:58:53,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178583 conditions, 88717 events. 64726/88717 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 565802 event pairs, 29057 based on Foata normal form. 0/34905 useless extension candidates. Maximal degree in co-relation 178565. Up to 48257 conditions per place. [2023-08-29 22:58:53,920 INFO L137 encePairwiseOnDemand]: 1837/1845 looper letters, 171 selfloop transitions, 5 changer transitions 0/176 dead transitions. [2023-08-29 22:58:53,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 826 flow [2023-08-29 22:58:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:58:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:58:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3704 transitions. [2023-08-29 22:58:53,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40151761517615175 [2023-08-29 22:58:53,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3704 transitions. [2023-08-29 22:58:53,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3704 transitions. [2023-08-29 22:58:53,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:58:53,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3704 transitions. [2023-08-29 22:58:53,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 740.8) internal successors, (3704), 5 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:53,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:53,937 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:53,937 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 321 flow. Second operand 5 states and 3704 transitions. [2023-08-29 22:58:53,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 826 flow [2023-08-29 22:58:53,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 176 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:58:53,940 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 351 flow [2023-08-29 22:58:53,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2023-08-29 22:58:53,941 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -11 predicate places. [2023-08-29 22:58:53,941 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 351 flow [2023-08-29 22:58:53,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:53,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:58:53,942 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:58:53,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:58:54,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-29 22:58:54,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-08-29 22:58:54,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:58:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash 493713097, now seen corresponding path program 1 times [2023-08-29 22:58:54,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:58:54,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698513064] [2023-08-29 22:58:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:58:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:58:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:58:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-08-29 22:58:54,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:58:54,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698513064] [2023-08-29 22:58:54,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698513064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:58:54,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:58:54,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:58:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704207307] [2023-08-29 22:58:54,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:58:54,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:58:54,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:58:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:58:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:58:54,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1845 [2023-08-29 22:58:54,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 712.4) internal successors, (3562), 5 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:58:54,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:58:54,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1845 [2023-08-29 22:58:54,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand